CN102976797A - Method for extracting potassium co-production liquid salt from concentrated seawater - Google Patents
Method for extracting potassium co-production liquid salt from concentrated seawater Download PDFInfo
- Publication number
- CN102976797A CN102976797A CN2012105432197A CN201210543219A CN102976797A CN 102976797 A CN102976797 A CN 102976797A CN 2012105432197 A CN2012105432197 A CN 2012105432197A CN 201210543219 A CN201210543219 A CN 201210543219A CN 102976797 A CN102976797 A CN 102976797A
- Authority
- CN
- China
- Prior art keywords
- potassium
- liquid
- concentrated seawater
- ammonium chloride
- liquid salt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The invention discloses a method for extracting a potassium co-production liquid salt from concentrated seawater, and the method comprises the following steps of: taking natural clinoptilolite as an ion exchanger, and absorbing potassium in concentrated seawater of which the elements, namely bromine, magnesium, calcium and the like, are extracted, wherein the flow speed that the seawater passes into the natural clinoptilolite is 15-20mL/min, and the low-potassium exchange fluid in the obtained exchange fluid is a liquid salt product; taking saturated ammonium chloride solvating as a desorption solution, flowing into potassium-absorbed zeolite at the flow speed of 10-15mL/min, eluting to obtain a potassium-enriched eluant, and evaporating and concentrating the potassium-enriched eluant to obtain an ammonium chloride potassium product; and eluting potassium ion-absorbed zeolite, regenerating by liquid salt, and recycling. According to the method, the seawater of which the elements, namely bromine, magnesium, calcium and the like, are extracted is taken as a raw material liquid, so that the high-quality ammonium chloride potash fertilizer with large market demand can be obtained, the comprehensive utilization rate of the concentrated seawater can be improved, and the low-potassium production cost can be reduced.
Description
Technical field
The present invention relates to the multipurpose use of sea water technology, particularly relate to and from concentrated seawater, extract potassium method of producing liquid salt in parallel.
Background technology
The potassium resource that is richly stored with in the seawater, total reserves reaches 500,000,000,000,000 tons according to estimates.Yet the grade of potassium resource is extremely low in the natural sea-water, and the potassium ion average content only is 0.38g/L in the seawater.The potassium from sea water method mainly contains chemical precipitation method, organic solvent extractionprocess and film exchange process etc. at present.Chemical precipitation method is the dissolubility property by sylvite, with chemical substance sylvite is precipitated out from seawater, again throw out is carried out chemical treatment, thereby obtains soluble potassium salt.Organic solvent extractionprocess is to utilize some organic solvent water insoluble and sylvite is had good dissolution characteristics, and the sylvite in the seawater is extracted.The loss meeting of the precipitation agent of chemical precipitation method and organic solvent extractionprocess and organic solvent causes some pollution to environment.The film exchange process is to utilize the ion-selective permeability of ion-exchange membrane, use ion-exchange membrane to process seawater, what obtain high-temperature and high concentration contains potassium solution (70～90 ℃), obtains Repone K after the cooling, can realize that monovalent ion separates with bivalent ions, still difficulty is accomplished sodium ion Na
+With potassium ion K
+Separation.The adsorption process of aforesaid method is gone back the problems such as ubiquity material cycling amount is large, the extraction material price is expensive, schedule of operation is complicated, power consumption is large, extraction cost is high.
Summary of the invention
Problem for existing potassium from sea water method existence, the present invention releases the novel method that a kind of concentrated seawater is put forward potassium coproduction liquid salt, the concentrated seawater that its purpose is to extract behind the chemical elements such as bromine, magnesium, calcium is stock liquid, take natural oblique method zeolite as exchanger, take saturated ammonium chloride solution as stripping liquid, obtain height and contain the potassium elutriant, obtain ammonium chloride potassium after the evaporation concentration.
The method that a kind of concentrated seawater that the present invention relates to is put forward potassium coproduction liquid salt comprises: take using natural clinoptilolite as ion-exchanger, the potassium in the concentrated seawater behind the elements such as bromine, magnesium, calcium is carried in absorption, and the low potassium exchange liquid in the gained exchange liquid is the liquid salt product; Take saturated ammonium chloride solution as stripping liquid, the zeolite after the wash-out k adsorption obtains rich potassium elutriant; Obtain ammonium chloride potassium product after the rich potassium elutriant evaporation concentration; Behind the zeolite wash-out of k adsorption ion, by liquid salt regeneration, recycle.
Concrete technology step of the present invention comprises Adsorption and desorption, regeneration and evaporation concentration.
(1) absorption
The concentrated seawater of carrying behind the elements such as bromine, magnesium, calcium is passed into Na
+In the type using natural clinoptilolite, the flow velocity of concentrated seawater stock liquid is 15～20mL/min, the potassium ion K in the concentrated seawater
+Be adsorbed on the zeolite Na
+The type zeolite becomes K
+The type zeolite; The exchange liquid Fractional Collections that flows out, leading portion K
+The low potassium exchange liquid of≤0.5g/L is collected back segment K as liquid salt
+0.5g/L high potassium exchange liquid with enter the next one after the concentrated seawater stock liquid mixes and circulate.
(2) desorb
At k adsorption ion K
+Zeolite in pass into the stripping liquid of saturated ammonium chloride solution, ammonium chloride solution concentration is 265g/L, passing into flow velocity is 10～15mL/min, K
+The type zeolite becomes NH
4 +The type zeolite; The elutriant Fractional Collections that flows out, leading portion obtains K
+The rich potassium elutriant of＞15g/L, back segment K
+The poor potassium elutriant of≤15g/L with enter next circulation after stripping liquid mixes.
(3) regeneration
The liquid salt that obtains in the step (1) passes into NH as regenerated liquid
4 +In the type zeolite, it is 7～10mL/min that regenerated liquid passes into flow velocity, NH
4 +The type zeolite becomes Na
+The type zeolite is for the potassium ion K that loops the concentrated seawater stock liquid
+Absorption.
(4) evaporation concentration
With the potassium ion K that obtains after the desorb
+The rich potassium elutriant evaporation concentration of＞15g/L obtains ammonium chloride potassium product.
A kind of concentrated seawater that the present invention relates to is put forward the method for potassium coproduction liquid salt, and concentrated seawater obtains the high-quality ammonium chloride potash fertilizer of the huge market demand as stock liquid after to carry the elements such as bromine, magnesium, calcium, improves the comprehensive utilization ratio of concentrated seawater, reduces and carries the potassium cost; The indices of institute's coproduction liquid salt reaches QB/T1879-2001 liquid salt standard, and alternative crude salt is used for the alkaline industry, reduces production costs.
The present invention is the production technique that a kind of energy consumption is low, cost is low concentrated seawater is put forward potassium coproduction liquid salt.
Description of drawings
Fig. 1 is the process route chart that a kind of concentrated seawater is put forward the method for potassium coproduction liquid salt.
Embodiment
In conjunction with following embodiment technical scheme of the present invention is described further:
Get 4 glass exchange columns, be of a size of
15mm * 1400mm, every exchange column dress Na
+Type using natural clinoptilolite 150g is with the ion exchange column series connection of 4 dress using natural clinoptilolites.Get 8L and carry concentrated seawater behind bromine, magnesium, the calcium as stock liquid, potassium ion K in the stock liquid
+Concentration is 2.69g/L, SO
4 2-Concentration is 4.88g/L, Ca
2+Concentration is 0.60g/L.
From bottom to top through the ion exchange column of series connection, flow velocity is 16mL/min, the potassium ion K in the stock liquid with stock liquid
+Be adsorbed on the zeolite in the ion exchange column Na
+The type zeolite becomes K
+The type zeolite.The exchange liquid that collection is flowed out from ion exchange column detects the potassium ion K that exchanges in the liquid every the 15min sampling
+Concentration.When being adsorbed to 390min, K in the exchange liquid
+Concentration is 0.4852g/L; When being adsorbed to 405min, K in the exchange liquid
+Concentration is 0.4976g/L, changes exchange liquid collection container this moment.The low potassium exchange liquid (K that leading portion is collected
+Concentration≤0.5g/L) be liquid salt, the high potassium that back segment is collected exchanges liquid (K
+Concentration〉0.5g/L) carry out next one circulation.
Getting 5L saturated ammonium chloride solution (concentration is 265g/L) is stripping liquid, from bottom to top through containing K
+The ion exchange column of type zeolite, flow velocity is 12mL/min, the K in the ion exchange column
+The type zeolite becomes NH4
+The type zeolite.Every the potassium concentration of 15min sampling detection from ion exchange column outflow elutriant.When solution is drawn to 90min, K in the exchange liquid
+Concentration is 15.1356g/L; When being adsorbed to 105min, K in the exchange liquid
+Concentration is 15.0752g/L, changes exchange liquid collection container this moment.That leading portion is collected is rich potassium elutriant (K
+Concentration＞15g/L), the poor potassium elutriant (K that back segment is collected
+Concentration≤15g/L) with after stripping liquid mixes carry out next one circulation.
With the rich potassium elutriant (K that collects
+The evaporation concentration of concentration＞15g/L) obtains ammonium chloride potassium product.
It is regenerated liquid that the self-produced liquid salt of this technique is adopted in the regeneration of zeolite, from bottom to top through containing NH
4 +The ion exchange column of type zeolite, flow velocity is 8mL/min, the NH in the ion exchange column
4 +The type zeolite becomes Na
+The type zeolite, 3 circulations are consumable liquid salt 1L altogether.Ion exchange column recycles.
After 3 circulations, test-results is as follows:
8L concentrated seawater stock liquid obtains the rich potassium elutriant of 1.1L, obtains 58.55g ammonium chloride potassium after the evaporation concentration, and the potassium ion yield is 82.90%; Obtain the 5L liquid salt, wherein 1L is used for the regeneration zeolite as regenerated liquid, and the 4L liquid salt is as the alkaline raw material.
Claims (6)
1. a concentrated seawater is put forward the method for potassium coproduction liquid salt, it is characterized in that, take using natural clinoptilolite as ion-exchanger, the potassium in the concentrated seawater stock liquid behind the elements such as bromine, magnesium, calcium is carried in absorption, and the low potassium exchange liquid in the gained exchange liquid is the liquid salt product; Take saturated ammonium chloride solution as stripping liquid, the zeolite behind the wash-out k adsorption ion obtains rich potassium elutriant; Obtain ammonium chloride potassium product after the rich potassium elutriant evaporation concentration; Behind the zeolite wash-out of k adsorption ion, by liquid salt regeneration, recycle.
2. put forward the method for potassium coproduction liquid salt in a kind of concentrated seawater according to claim 1, it is characterized in that, the described potassium that adsorbs take using natural clinoptilolite as ion-exchanger in the concentrated seawater stock liquid passes into Na by concentrated seawater
+In the type using natural clinoptilolite, Na
+The type zeolite becomes K
+Type zeolite, the flow velocity of concentrated seawater are 15～20mL/min.
3. put forward the method for potassium coproduction liquid salt in a kind of concentrated seawater according to claim 2, it is characterized in that, describedly pass into Na by concentrated seawater
+In the type using natural clinoptilolite, the exchange liquid Fractional Collections of outflow, leading portion K
+The low potassium exchange liquid of≤0.5g/L is collected back segment K as liquid salt
+0.5g/L high potassium exchange liquid with enter the next one after the concentrated seawater stock liquid mixes and circulate.
4. according to claim 1ly a kind ofly put forward the method for potassium coproduction liquid salt for concentrated seawater, it is characterized in that, described zeolite after take saturated ammonium chloride solution as stripping liquid wash-out k adsorption passes into K by saturated ammonium chloride solution
+In the type zeolite, K
+The type zeolite becomes NH
4 +Type zeolite, the flow velocity of saturated ammonium chloride solution are 10～15mL/min, and saturated ammonium chloride solution concentration is 265g/L.
5. put forward the method for potassium coproduction liquid salt in a kind of concentrated seawater according to claim 4, it is characterized in that described stripping liquid by saturated ammonium chloride solution passes into K
+In the type zeolite, the elutriant Fractional Collections of outflow, leading portion obtains K
+The rich potassium elutriant of＞15g/L, back segment K
+The poor potassium elutriant of≤15g/L with enter next circulation after stripping liquid mixes.
6. according to claim 1ly a kind ofly put forward the method for potassium coproduction liquid salt for concentrated seawater, it is characterized in that by liquid salt regeneration, liquid salt passes into NH as regenerated liquid behind the zeolite wash-out of described k adsorption ion
4 +The type zeolite, NH
4 +The type zeolite becomes Na
+The type zeolite, the flow velocity that passes into of liquid salt is 7～10mL/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105432197A CN102976797A (en) | 2012-12-14 | 2012-12-14 | Method for extracting potassium co-production liquid salt from concentrated seawater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105432197A CN102976797A (en) | 2012-12-14 | 2012-12-14 | Method for extracting potassium co-production liquid salt from concentrated seawater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102976797A true CN102976797A (en) | 2013-03-20 |
Family
ID=47851205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105432197A Pending CN102976797A (en) | 2012-12-14 | 2012-12-14 | Method for extracting potassium co-production liquid salt from concentrated seawater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102976797A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030735A (en) * | 2014-07-07 | 2014-09-10 | 云南省轻工业科学研究院 | Preparation method of high-concentration water-soluble plant potash fertilizer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2104969C1 (en) * | 1996-08-07 | 1998-02-20 | Институт геохимии и аналитической химии им.В.И.Вернадского РАН | Method for comprehensive processing of seawater and plant for its embodiment |
| US20070029259A1 (en) * | 2003-02-04 | 2007-02-08 | Hirotaka Kakita | Method of reducing impurity content in aqueous salt solution |
| CN101823732A (en) * | 2009-03-05 | 2010-09-08 | 河北工业大学 | Method for preparing ammonium chloride with seawater |
| CN101850991A (en) * | 2010-01-14 | 2010-10-06 | 河北工业大学 | Method for preparing potassium chloride from seawater |
| CN102009965A (en) * | 2010-12-23 | 2011-04-13 | 河北工业大学 | Method for preparing monopotassium phosphate by using seawater |
-
2012
- 2012-12-14 CN CN2012105432197A patent/CN102976797A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2104969C1 (en) * | 1996-08-07 | 1998-02-20 | Институт геохимии и аналитической химии им.В.И.Вернадского РАН | Method for comprehensive processing of seawater and plant for its embodiment |
| US20070029259A1 (en) * | 2003-02-04 | 2007-02-08 | Hirotaka Kakita | Method of reducing impurity content in aqueous salt solution |
| CN101823732A (en) * | 2009-03-05 | 2010-09-08 | 河北工业大学 | Method for preparing ammonium chloride with seawater |
| CN101850991A (en) * | 2010-01-14 | 2010-10-06 | 河北工业大学 | Method for preparing potassium chloride from seawater |
| CN102009965A (en) * | 2010-12-23 | 2011-04-13 | 河北工业大学 | Method for preparing monopotassium phosphate by using seawater |
Non-Patent Citations (3)
| Title |
|---|
| 宁波梅山盐场，等: "用天然沸石直接从海水中提取氯化钾", 《浙江化工》 * |
| 张家凯，等: "淡化后浓海水综合利用新工艺", 《2012青岛国际脱盐大会论文集》 * |
| 袁俊生，等: "海水提钾技术研究进展", 《河北工业大学学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030735A (en) * | 2014-07-07 | 2014-09-10 | 云南省轻工业科学研究院 | Preparation method of high-concentration water-soluble plant potash fertilizer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Park et al. | Lithium recovery from artificial brine using energy-efficient membrane distillation and nanofiltration | |
| Gmar et al. | Recent advances on electrodialysis for the recovery of lithium from primary and secondary resources | |
| Sharkh et al. | Seawater desalination concentrate—a new frontier for sustainable mining of valuable minerals | |
| Kumar et al. | Metals recovery from seawater desalination brines: technologies, opportunities, and challenges | |
| CN108342595B (en) | Co-extraction method of boron and lithium in brine | |
| CN104313348B (en) | A kind of method that absorption method extracts Lithium from Salt Lake Brine | |
| CN103523801B (en) | Method for combined extraction of potassium, boron and lithium from chloride type potassium-containing underground brine | |
| CN102070162B (en) | Method for extracting lithium from salt lake brine | |
| WO2016184055A1 (en) | Process method for extracting magnesium and lithium from brine and coproducing hydrotalcite | |
| CN103572071B (en) | A kind of method of refining lithium from salt lake brine with high magnesium-lithium ratio | |
| CN103074502A (en) | Salt lake brine treatment method for separating lithium from high-magnesium-lithium-ratio salt lake brine | |
| CN106076243A (en) | A kind of method of micropore aluminium salt lithium adsorbent and preparation method thereof, filler and enriching lithium ion | |
| US20170233301A1 (en) | Method, system and a process for producing fertilizers from seawater | |
| CN105174556B (en) | A kind of method of peracid high ferro heavy metal wastewater thereby sub-prime resource reclaim | |
| CN102417194A (en) | Method for deeply removing magnesium through chelating resin for extracting lithium from salt lake brine | |
| CN105256150A (en) | Method for extracting rubdium and cesium from acid brine | |
| CN102876890A (en) | Method for recovering uranium from beryllium uranium ore with wet process | |
| CN102935299A (en) | Method for extracting lithium ions by manganese oxide adsorbing material | |
| Zhang et al. | Preparation of Li2CO3 from high Mg2+/Li+ brines based on selective-electrodialysis with feed and bleed mode | |
| CN109748298A (en) | A kind of method and device thereof of Selective Separation magnesium enriching lithium spontaneous from brine containing lithium | |
| US20220136081A1 (en) | Systems and Methods for Recovering Lithium from Brines Field | |
| CA3136247C (en) | Systems and methods for recovering lithium from brines | |
| CN106629788A (en) | Production process of lithium chloride | |
| CN101927214B (en) | Technology for extracting potassium from potassium mixed salt containing picromerite, KCL and carnallite | |
| CN105217644B (en) | A kind of method that magnesium-based hydrotalcite coproduction boric acid is prepared using salt lake brine with high magnesium-lithium ratio |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130320 |